---------- Forwarded message --------- De: Mario Palomares <palomares.mari...@gmail.com> Date: dom., 17 may. 2020 a las 18:33 Subject: Re: JTAG error with arm-rtems-gdb To: Alan Cudmore <alan.cudm...@gmail.com>
Hi Alan, I have done what you told me (set up the whole environment) and it worked. First i have to configure the RPI to boot on 64 bit mode (just setting a parameter on config.txt) and later on could establish GDB connection with the gdb the aaarch64 toolchain offers. Gdb-multiarch also worked. It seems the problem is on that amrv8-a53 clusters working in 32 bit mode. I don´t know if openOCD has support for amv8-a cores working in 32 bit or if i have to change my configuration file. Does this make sense to you? As an alternative in case this doesn´t work i am currently trying to use the remote debugging through libdebugger but i am experiencing some problems when building the rtems-libbsd library. Should i ask here or create another subject?. Regards, Mario El sáb., 16 may. 2020 a las 15:58, Alan Cudmore (<alan.cudm...@gmail.com>) escribió: > Hello Mario, > > Did you try bringing up the complete bare metal environment in the Bare > Metal Raspberry Pi 3b JTAG blog entry? > > I would verify that that environment with the bare metal Aarch64 examples > work before trying to get the 32 bit RTEMS binaries to work. > > It seems like these should work on the Pi2 with the A53 cores > > https://metebalci.com/blog/bare-metal-rpi3-programming/ > > But the UART example might not work due to the differences between how the > uarts are used on the Pi2 and 3. > > > > Does the ARM multiarch GDB work with Aarch64? Maybe try the Aarch64 GDB > mentioned in the bare metal RPI3 blog entry? > > > > Alan > > > > > > *From: *Mario Palomares <palomares.mari...@gmail.com> > *Sent: *Saturday, May 16, 2020 7:41 AM > *To: *users@rtems.org > *Subject: *JTAG error with arm-rtems-gdb > > > > I am tryining to debug RTEMS programs on mi RPI2 through a JTAG conexion > with OpenOCD. Right now i have the connection correctly established and i > can connect through a telnet client. Whenever I try to connect through > arm-rtems5-gdb i get the following error > > > > warning: while parsing target description (at line 4): Target description > specified unknown architecture "aarch64" > warning: Could not load XML target description; ignoring > Truncated register 16 in remote 'g' packet > > > > The configuration file i use for the RPI can be found in this page > > https://metebalci.com/blog/bare-metal-raspberry-pi-3b-jtag/. : > > I can´t use the configuration file proposed here: > > > https://github.com/ppisa/rpi-utils/blob/master/jtag-debug/rpi2/rpi-jt_usb5.cfg > by > Pavel because my RPI is a RPI2 v1.2 which has the same SoC that the RPI3. > If i try Pavels configuration file the connection fails. > > > > I have installed gdb multiarch and tried with it but no luck, when i set > the architecture to aarch64 i get: > > > > warning: Architecture rejected target-supplied description > Truncated register 8 in remote 'g' packet > > > > Any ideas how to get arround this ? > > >
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